- Apr 21, 2013
- Reaction score
- Winnipeg, Canada
Yah Peter it was a late night. Yes I blew that one. And yes you can step-up both voltage and current but, inversely. Yes a capacitor stores a charge but, current is not the major side of the charge. It's just like an inductor leans more toward current. Certain capacitors that are good at storing a charge however usually have a rating Dv/Dt on how fast you can safely charge a storage capacitor. In fact some of the big capacitors we used on the locomotive alternators for noise suppression use to once and awhile puke their guts out if the traction motors got disconnected under full load and gen voltage spiked. The metal film charge capacitors that I use have a 300v/usec. Dv/Dt and 8mOhm ESR rating and they have been holding up.Ray, you are confused, you said:
"A capacitor stores voltage! You can not step up voltage but, you can step up current using a transformer aka ignition coil."
no, a capacitor stores charge, and no, an ignition coil does not step up current it steps up voltage (and steps down current). and from there things just get worse...
I have attached a PDF file and in it, it explains the ringing and what causes it. I think it explains it better than I did.